/in/foo.cc: In function 'std::vector<int> SetUnion(int*, int, int*, int)':
/in/foo.cc:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |         while (j < unionSet.size()) {
      |                ~~^~~~~~~~~~~~~~~~~
/in/foo.cc:27:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         while (j < unionSet.size()) {
      |                ~~^~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:69:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |     while (j < union1.size()) {
      |            ~~^~~~~~~~~~~~~~~
/in/foo.cc:76:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |     while (j < union2.size()) {
      |            ~~^~~~~~~~~~~~~~~